Bike/Equipment reviews, especially comparisons, are really useful but I think the holy grail is offering a framework for groups of a particular make/model, to have a forum/list/pix/database/bookmarks/etc.
What's really great about the Internet is that people can form a community in it, regardless of where in the world they are. As a 5-month owner of a V-Strom, myself and several hundred other guys have recently done this for our common ride. Actually we've done it twice. We've used Yahoo Groups, which isn't bad, but it isn't perfect. The group, like many others, is surprisingly dedicated, enthusiastic and helpful. I also follow the Yahoo Group for KLR650s, which is up to 2500 members. Delphi has some groups also, but they also seem somewhat limited.
If you wanted to (I know it would be a ****load of work, and consume gobs of storage and bandwidth), the world could use a great forum hosting system to handle 75 to 150 groups oriented around popular motorcycle models. The groups would probably pay a small amount per year; but I think you're advertisers would go orgasmic to get at tens of thousands dedicated riders, in focused channels. Yeah, it would also take years to get a large number of large groups migrated over, but you're in this for the long-haul, aren't you?
Anyway, that's my 2 cents. I also vote for babes, and if Burnsy wants to rant and rave now and then, let him.